900 HELIX. 



Helix siiiuosa. Gmelin, p. 3622. 



Helix, No. 66, and No. '200. Schroeter Einl. ii. p. 195, 



and p. 252. 

 Lister Conch, t. 97. f. 98. Fammie, t. 63. f. F 8. 



Inhabits America. Midler. Barbadoes and Jamaica. Lister. 



Shell about half an inch long, and nearly twice as broad, of a 

 pale yellowish brown colour, generally fasciated with white 

 on the keel of the body-whirl, and the base white ; it has 

 five whirls, forming a rounded obtuse spire, and they are 

 every where covered with minute elevated dots ; the aper- 

 ture is ear-shaped, with four strong teeth on the lip, and cor- 

 responding indentures behind. 



LUCERNA. 30. Shell imperforate, keeled, and rather 

 depressed; lip reflected, with two teeth on 

 the inside, and corresponding impressions be- 

 hind. 



Helix Lucerna. Muller Verm. ii. p. 13. Chemnitz, ix. 



p. 90. t. 126. f. 1108 and 1 109. Gmelin, p.36ig. 

 Helix sinuata, Var. /3. Gme/m, p. 3618. 

 Lister Conch, t. 96. f. 97- 



Inhabits the East Indies. Lister, Jamaica. Chemnitz. 



Shell about half an inch long, and an inch and a quarter broad, 

 of a pale purplish brown colour, with a whitish band on the 

 keel ; it has six whirls without any strias, but studded all 

 over with minute elevated dots ; the aperture is tinged with 

 violet, and in form resembles that of U. sinuata. 



LYGHNUcus. 31. Shell imperforate, keeled, trochi- 

 form, and white with yellowish brown bands; 

 aperture transverse, with two teeth. 

 Helix Lychnucus. Muller Verm. ii. p. 81. Gmelin, 



p. 3619. 

 Lister Conch, t. 90. f. 90. 

 Inhabits Jamaica. Lister. 



This shell appears, from MuUer's description, to be very nearly 

 allied to H. Lucerna, and he says it is intermediate be- 

 tween H. Lucerna and H. Lychnus ; but there is not any 

 species under the latter name, and in this, as well as many 

 other instances, he unfortunately appears to have changed 

 the name after the descriptions were written ; he says it may 

 be known by its having the apex only, and not any of the 

 other M'hirls, depressed, and by having a band both on the 

 margin and the keel. 



